[{"data":1,"prerenderedAt":-1},["ShallowReactive",2],{"$fsyOqAhly8Nn5eIudJmvdIi6GVYi5e3OXj-gT0IVmmmw":3},{"answer":4,"createTime":5,"id":6,"options":7,"origin":12,"question":16,"related":17,"source":27,"type":28},[],"2026-05-30 22:44:33",393618538,[8,9,10,11],"4.0","2.8","5.1","3.4",{"courseId":13,"courseImg":14,"courseName":15},"b0a69a972d6a86e51a70f6082d249caf","https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F9c1e48361b00f3ee2086f4e259ed792b.jpg","分析化学智慧课程","假设Fe2+和EDTA的浓度均为10-2 mol·L-1,用EDTA标准溶液准确滴定Fe2+允许的最低pH值是( )(lgKFeY=14.33) pH lgαY(H) pH lgαY(H) pH lgαY(H) 2.8 11.09 3.8 8.85 4.8 6.84 3.0 10.60 4.0 8.44 5.0 6.45 3.4 9.70 4.4 7.64 5.4 5.89",[18,29,38,47,56,59],{"answer":19,"createTime":5,"id":20,"options":21,"question":26,"source":27,"type":28},[],393618534,[22,23,24,25],"pH ≈ 4","pH ≈ 5","pH ≈ 6","pH ≈ 7","已知 lgKZnY=16.5和 pH 4 5 6 7 lg aY(H) 8.44 6.45 4.65 3.32 若用0.02mol·L-1 EDTA滴定0.02mol·L-1 Zn2+溶液,要求DpM=0.2,Et=0.1%,则滴定时最高允许酸度是( )","v1",0,{"answer":30,"createTime":5,"id":31,"options":32,"question":37,"source":27,"type":28},[],393618535,[33,34,35,36],"5","6","7","8","络合滴定中,当被测离子M浓度为干扰离子N浓度的1\u002F10倍时,欲用控制酸度的方法滴定,要求Et≤±0.1%,ΔpM'=±0.2,则lgKMY-lgKNY应大于( C )",{"answer":39,"createTime":5,"id":40,"options":41,"question":46,"source":27,"type":28},[],393618536,[42,43,44,45],"酸效应系数aY(H)","共存离子副反应系数aY(N)","酸效应系数aY(H) 和共存离子副反应系数aY(N)","配合物稳定常数KMY和KNY之比值","在一定酸度下,用EDTA滴定金属离子M.若溶液中存在干扰离子N时,则影响EDTA配位的总副反应系数大小的因素是( )",{"answer":48,"createTime":5,"id":49,"options":50,"question":55,"source":27,"type":28},[],393618537,[51,52,53,54],"lgKMY≥6.0","lgK\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F2c62198f796323266763a6c887ecbcdf.png\">≥6.0","lg(c计KMY)≥6.0","lg(c计K\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F2c62198f796323266763a6c887ecbcdf.png\">)≥6.0","EDTA滴定金属离子时,准确滴定(Et<0.1%)的条件是( )",{"answer":57,"createTime":5,"id":6,"options":58,"question":16,"source":27,"type":28},[],[8,9,10,11],{"answer":60,"createTime":5,"id":61,"options":62,"question":67,"source":27,"type":28},[],393618539,[63,64,65,66],"4.4","7.6","5.8","5.0","在pH=7.0时,假设Ca2+和EDTA的浓度均为10-2 mol·L-1(不考虑羟基配位等副反应),用EDTA标准溶液准确滴定Ca2+允许的最低pH值是( )(lgKCaY=10.69) pH lgαY(H) pH lgαY(H) pH lgαY(H) 4.4 7.64 5.8 4.98 7.0 3.32 4.8 6.84 6.0 4.65 7.4 2.88 5.0 6.45 6.4 4.06 7.8 2.47 5.4 5.89 6.8 3.55 8.0 2.27"]